The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2000
Filed:
Jun. 26, 1998
John M Hargedon, Chandler, AZ (US);
Randall T Wollschlager, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A half-bridge driver provides a current limit on the low-side driver (20) and a current limit on the high-side driver (16). The current limits are initially set equal. If the low-side driver current limits, then a modulation current from the low-side driver increases the high-side driver current limit threshold to maintain stable operation of the control circuits. In addition, the present invention provides dual conduction paths to charge the main conduction transistor of the low-side driver, while detecting current limit. When current limit is detected, the charging current to the main conduction transistor is switched to current limit mode.